I recently had a used computer put in (2 mths ago) to alleviate a constant "check engine" light in which two mechanics couldn't find the problem. The computer appeared to be the problem (because of the codes it was showing). I was driving to work, coming to a stop & the car started sputtering as if it wanted to cut off. I put it in neutral & pushed the gas pedal; it continued to idle fast & sputter. I pulled over, turned the car off and then restarted it. The stinking check engine light came on and the car ran fine. I drove another 19 miles with no problem. Any idea what could be wrong? I don't have a computer to see what code it's giving.